Bump piccolo from 1.17.1 to 1.20.0 in /bot

[dependabot]

Bumps piccolo from 1.17.1 to 1.20.0.

Release notes

Sourced from piccolo's releases.

1.20.0

get_related now works multiple layers deep:

concert = await Concert.objects().first()
manager = await concert.get_related(Concert.band_1._.manager)

1.19.1

Fixed a bug with the get_m2m method, which would raise a ValueError when no objects were found. It now handles this gracefully and returns an empty list instead. Thanks to @​nVitius for this fix.

Improved the ASGI templates (including a fix for the latest Litestar version). Thanks to @​sinisaos for this.

1.19.0

Added support for row locking (i.e. SELECT ... FOR UPDATE).

For example, if we have this table:

class Concert(Table):
    name = Varchar()
    tickets_available = Integer()

And we want to make sure that tickets_available never goes below 0, we can do the following:

async def book_tickets(ticket_count: int):
    async with Concert._meta.db.transaction():
        concert = await Concert.objects().where(
            Concert.name == "Awesome Concert"
        ).first().lock_rows()
    if concert.tickets_available >= ticket_count:
        await concert.update_self({
            Concert.tickets_available: Concert.tickets_available - ticket_count
        })
    else:
        raise ValueError("Not enough tickets are available!")

This means that when multiple transactions are running at the same time, it isn't possible to book more tickets than are available.

Thanks to @​dkopitsa for adding this feature.

1.18.0

update_self

Added the update_self method, which is an alternative to the save method. Here's an example where it's useful:

... (truncated)

Changelog

Sourced from piccolo's changelog.

1.20.0

get_related now works multiple layers deep:

.. code-block:: python

concert = await Concert.objects().first()
manager = await concert.get_related(Concert.band_1._.manager)

---

1.19.1

Fixed a bug with the get_m2m method, which would raise a ValueError when no objects were found. It now handles this gracefully and returns an empty list instead. Thanks to @​nVitius for this fix.

Improved the ASGI templates (including a fix for the latest Litestar version). Thanks to @​sinisaos for this.

---

1.19.0

Added support for row locking (i.e. SELECT ... FOR UPDATE).

For example, if we have this table:

.. code-block:: python

class Concert(Table): name = Varchar() tickets_available = Integer()

And we want to make sure that tickets_available never goes below 0, we can do the following:

.. code-block:: python

async def book_tickets(ticket_count: int): async with Concert._meta.db.transaction(): concert = await Concert.objects().where( Concert.name == "Awesome Concert" ).first().lock_rows()

      if concert.tickets_available >= ticket_count:
          await concert.update_self({

... (truncated)

Commits

• f4bf25a bump version
• 57673af more tests (#1095)
• 2cae26b 1091 Make get_related work multiple levels deep (#1092)
• a8d401e fix typo in changelog
• 1b34405 bumped version
• 5173a39 1090 fix(m2m): Return empty list if there are no m2m entries (#1089)
• 36ccc28 integration test update for Esmerald (#1087)
• 6aa998c Update asgi templates (#1088)
• d7ead82 add video link to lock_rows docs
• f044c21 Update CHANGES.rst
• Additional commits viewable in compare view

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[dependabot]

Superseded by #43.